Abstract: A reactive functional group-containing polyarylene sulfide resin composition having a narrow polydispersity and a low gas generation amount is manufactured by mixing a polyarylene sulfide resin (a) and a polyarylene sulfide resin (b), wherein the polyarylene sulfide (a) has a weight reduction ratio ?Wr of not higher than 0.18% under heating and an increase rate of melt viscosity of less than 1.05 times by addition of a reactive compound (c) having a reactive group relative to melt viscosity prior to addition of the reactive compound (c), and the polyarylene sulfide (b) has the weight reduction ratio ?Wr of not higher than 0.18% under heating and the increase rate of melt viscosity of not less than 1.05 times by addition of the reactive compound (c) having the reactive group relative to melt viscosity prior to addition of the reactive compound (c).

Abstract: A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.

Abstract: A reactive functional group-containing polyarylene sulfide resin composition having a narrow polydispersity and a low gas generation amount is manufactured by mixing a polyarylene sulfide resin (a) and a polyarylene sulfide resin (b), wherein the polyarylene sulfide (a) has a weight reduction ratio ?Wr of not higher than 0.18% under heating and an increase rate of melt viscosity of less than 1.05 times by addition of a reactive compound (c) having a reactive group relative to melt viscosity prior to addition of the reactive compound (c), and the polyarylene sulfide (b) has the weight reduction ratio ?Wr of not higher than 0.18% under heating and the increase rate of melt viscosity of not less than 1.05 times by addition of the reactive compound (c) having the reactive group relative to melt viscosity prior to addition of the reactive compound (c).

Abstract: A polyarylene sulfide includes 0.01 to 5 mol %, per mol of arylene sulfide structural units, of a function group selected from the group consisting of an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an isocyanate group, an epoxy group, a silanol group, and an alkoxysilane group having a dispersity represented by (weight average molecular weight)/(number average molecular weight) of 2.5 or less and a weight loss ratio at 100° C. to 330° C. of 0.2% by weight or less when the polyarylene sulfide is subjected to thermogravimetric analysis from 50° C. to 340° C. at a temperature ramp-up rate of 20° C./min under a non-oxidative atmosphere of normal pressure.

Abstract: A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.

Abstract: A polyarylene sulfide includes 0.01 to 5 mol %, per mol of arylene sulfide structural units, of a function group selected from the group consisting of an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an isocyanate group, an epoxy group, a silanol group, and an alkoxysilane group having a dispersity represented by (weight average molecular weight)/(number average molecular weight) of 2.5 or less and a weight loss ratio at 100° C. to 330° C. of 0.2% by weight or less when the polyarylene sulfide is subjected to thermogravimetric analysis from 50° C. to 340° C. at a temperature ramp-up rate of 20° C./min under a non-oxidative atmosphere of normal pressure.

Abstract: A reactive functional group-containing polyarylene sulfide being narrow in dispersity and little in gas generation amount is produced by heating a cyclic polyarylene sulfide composition in the presence of 0.1 mol % to 25 mol %, per mol of arylene sulfide structural units, of a sulfide compound having a reactive functional group selected from among an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an isocyanate group, an epoxy group, a silanol group, and an alkoxysilane group.

Abstract: A reactive functional group-containing polyarylene sulfide being narrow in dispersity and little in gas generation amount is produced by heating a cyclic polyarylene sulfide composition in the presence of 0.1 mol % to 25 mol %, per mol of arylene sulfide structural units, of a sulfide compound having a reactive functional group selected from among an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an isocyanate group, an epoxy group, a silanol group, and an alkoxysilane group.

Abstract: A method of producing an aromatic polyethersulfone (PES) having hydroxyphenyl end groups suitable as an alloying agent includes heating an aromatic polyester sulfone obtained beforehand by polymerization and a dihydric phenol compound and/or water and a basic compound in an aprotic polar solvent. According to this method, a PES having reactive hydroxyphenyl end groups, which can be suitably finely dispersed into a matrix resin when a thermoplastic resin or thermosetting resin and the PES are alloyed with each other, can be produced efficiently in a short time by an economical and simple method.

Abstract: A resin composition is described that is excellent in strength, impact resistance, heat resistance and moldability, while further allowing for a reduction in the amount of CO2 needed for its production. The resin composition includes a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), wherein the compatibilizer is preferably at least one species selected from: (C-1) a methyl methacrylate polymer; (C-2) a vinyl-based polymer which an epoxy unit or acid anhydride unit is copolymerized; (C-3) a graft polymer in which a methyl methacrylate unit is grafted to a rubbery polymer; and (C-4) a block copolymer having a polylactide segment and a vinyl-based polymer segment.

Abstract: The present invention provides a resin composition excellent in strength, impact resistance, heat resistance and moldability and further, of low environmental load capable of decreasing CO2 exhaustion in its production. The present invention is a resin composition comprising a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), and the compatibilizer is preferably at least one species described below.